Strap holder for watchcases



Oct. 8, 1929. l. DlNsTMAN 1,730,920

STRAP HOLDER FOR WATCHCASES Filed April 26, 1927 Z M5 f7/M24 l 28@Navo/3 25 2l M J/I M @Wd WJ /W- Patented Oct. 8, 1929' UNITED STATES.PATENT OFFICE ISIDOR DINSTMAN, OF NEW YORK, N. Y., ASSIGNOR TO DIELWATCH CASE COMPANY,

A CORPORATION OF NEW YORK STRAP HOLDER FOR WATCHCASES Application filedAprn 2e,

This invention relates to a strap or ribbon holder and is especiallyapplicable to wrist Watches. By the present invention the straps orribbons can be easily attached and detached by hand without thenecessity of any special implements, while at the same time the strapsor ribbons are securely held in place. The improvement herein describedcomprises'a pin that is adapted to be held in place between lugs on theperiphery of a watch case, and will be understood from the descriptionin vconnection with the accompanying drawings, in which Fig.'1 is a planview of a watch case showing a pin in posi tion; Fig. 2 is alongitudinal section through the pin; Fig. 3 is a section along the line3--3 of Fig. 2; Fig. 4 is a plan view of a watch case showing amodification; Fig. 5 is a side View of one of the details, and Fig. 6 isa section on an enlarged scale through the pin shown in Fig. 4.

In the drawings, reference character 6 indicates a watch case that isprovided with the usual lugs 7 between which a pin Sis retained forholding the wrist strap or ribbon in place.

The pin may be made up of two telescoping hollow sections, one of whichis longer than the other. The longer section is indicated at 9 and theend thereof is reduced in diameter as shown at 10 to provide an interiorshoulder 11 against which the end of a coil spring may rest, asdescribed below. The hollow section 9 may be provided with a roundindentation 12 and a corresponding projection on the inside of thesection, by pressing in the metal. The hollow section 13 is sufficientlysmall to enter the section 9 and move longitudinally therein. The grooveor recess 14 is provided in the section 13 and extends from near themiddle thereof to a point near its interior end. A spring 15 is placedin the section 9 and rests against the shoulder 11 and the inner endofthe section 13.

The pin is assembledby first introducing the spring 15 into the section9 and then pushing thc sect-ion 13 into place, after which theprojection 12 is forced by a blow, for example, into the recess 14. Thespring 15 keeps the section 13 moved to the extreme outward positionwiththe projection 12 in the 1927. Serial No. 186,616.

end of the notch 14, but permits the section 13 to be moved inwardly toshorten the pin as a whole. In order to place the pin upon the watchcase, the hollow end of the section 13 is placed over a projection onthe lug 7, and pressure is exerted upon the section 9 to shorten the pinsuiiiciently to permit the hollow end 10 to pass over the end of theprojection 16 on the other lug 7, whereupon the pin is permitted toexpand, thus mounting the same between the lug 7 with the hollow endssurrounding the projections 16. Instead of having the end of the section9 reduced, as shown at 10, this section may be made of uniform diameterfrom one end to the other and a stop for the pin provided on the insidein any convenient manner. Also, in this case the portion of the section13 that extends outside may be made of the same diameter as the section9 with the telescoping portion sufficiently reduced in diameter to enterthe sec` tion 9.

In the modilication shown in Figs. 4, 5 and 6, the pin is adapted forwatch cases 18 that are round or curved. In this modification the lugs19 are provided with holes 20 eX- tending part way therethrough. Theribbon holding pins are made up of a hollovr section 21 and a solidplug. The section 21 has its end reduced, as shown at 22, with the endeccentric so as to give more room for the ribbon to pass between the pinand the watch case. The plug 23 is preferably circular in cross section,as-shown at 24, to enter the hole 20 in the lug 19. The plug is providednear the end with a projection or thumb piece 25. This plug has aflattened portion 26, terminating at a lip 27 near the inner end. Achord 28 is formed by bending in the section 21 to extend along the flatportion 26, and thereby retaining the plug in place in slidingengagement with the section 21. In this modification a strapy29 is shownin place, from whichit will be seen that the projection 25 is enclosedin the fold of the strap and is out of View. A spring similar to thespring 15 of the other modification, is inside the section 21 and keepsthe members in their extended position. s

The pin can be easily removed by pressing upon the thumb piece orprojection 25, thus withdrawing the end of the in from the hole 20 inthe lug 19, and can e replaced in a similar manner. Since the strap 29is of flexible material, it will. yield without interfering with theoperation of putting the pins in place or removing the same.

In the illustrative embodiments of the invention, the projections 12 andthe chord 28, respectively, ma)7 prevent the telescoping parts fromturning circumferentially with respect to each other. This is especiallydesirable in the modification shown in Figs. 4c, 5 and 6, so that theprojection 25 will always be kept in areadily accessible position, andwill also be kept within the fold of the ribbon or strap as it passesaround the pin, thus eliminating the danger of the same catching againstexternal objects.

I claim:

l. In a watch case, lugs along the periphery thereof, a pin between saidlugs comprising hollow members, one of which telescopes into the otherand is of uniform size from one end to the other, and means to keep saidmembers extended and prevent them from separating.

2. In a watch case, lugs along the periphery thereof, a hollow pinbetween said lugs comprising hollow members, one of which telescopesinto the other and is of uniform size from one end to the other, andmeans to keep said members extended and prevent them from separating.

3. In a watch case, lugs along the periphery thereof, a pin between saidlugs comprising two hollow members, one of which telescopes into theother and is of uniform size from one end to the other, a spring in oneof said hollow members and means to prevent said members fromseparating.

4. In a watch case, lugs along the periphery thereof, a pin between saidlugs comprising telescoping members, means to keep said members extendedand means comprising a projection on one member and a recess in theother to keep said members from separating, one of said members beinghollow and reduced in diameter near one end thereof to form a seat forsaid spring.

5. In a watch case, lugs along the periphery thereof, a pin between saidlugs comprising two hollow members, one of which telescopes into theother and is of uniform size v from one end to the other, and means tokeep said members extended and prevent them from separating. v

6. In a watch case, lugs along the periphery thereof, a pin between saidlugs comprising two hollow members, one of which telescopes into theother and is of uniform size from one end to the other, and projectionson said lugs over which said members fit.

7. A holding device comprising hollow sections, one of which telescopesinto the other and is of uniform size from one end to the other, meansfor extending said sections, and means to limit the amount of saidextension.

8. In a watch case, lugs along the periphery thereof, a pin between saidlugs comprising hollow members, one of which telescopes into the other,one of said members being of uniform diameter throughout its lengthandthe other one bein'g reduced in diameter near one end thereof, and meansto keep said members extended and prevent them from separating.

9. In a watch case, lugs along the periphery thereof, a pin between saidlugs compris ing hollow members, one of which telescopes into the other,one of said members being of uniform diameter throughout its length andthe other one bein f reduced in diameter near one end thereof, t ereduced portion of the latter being substantially the same in diameteras the former and the inside diameter of the main portion of the,latterbeing of substantially the same diameter as the outside of the former,and means to keep said members extended and prevent them fromseparating.

l0. In a watch case, lugs along the periphery thereof, a pin betweensaid lugs comprising two members each one being hollow from one end tothe other with one of said members telescoping into the other, and meansto keep said members extended and prevent them from separating.

ISIDOR DINSTMAN.

